TISP61089 Gated Protector Series
APPLICATIONS INFORMATION
Application Circuit (Continued)
protector. The TISP7xxxF3 protector has the same protection voltage for any terminal pair. This protector is used when the ring generator
configuration may be ground or battery-backed. For dedicated ground-backed ringing generators, the TISP3xxxF3 gives better protection as
its inter-conductor protection voltage is twice the conductor to ground value.
Relay contacts 3a and 3b connect the line conductors to the SLIC via the ’61089 protector. The protector gate reference voltage comes from
the SLIC negative supply (VBAT). A 220 nF gate capacitor sources the high gate current pulses caused by fast rising impulses.
SLIC
PROTECTOR
SLIC
PROTECTOR
SLIC
SLIC
IF
Th5
IK
Th5
'61089
'61089
IG
VBAT
VBAT
C1
C1
220 nF
220 nF
AI6XAHC
AI6XAIC
Figure 4. Negative Overvoltage Condition
Figure 5. Positive Overvoltage Condition
OVER-
CURRENT
PROTECTION
RING/TEST
PROTECTION
TEST
RELAY
RING
RELAY
SLIC
RELAY
SLIC
PROTECTOR
SLIC
TIP
WIRE
Th1
S3a
Th4
RSa
S1a
S2a
Th3
RSb
Th5
Th2
RING
WIRE
S3b
TISP
3xxxF3
OR
'61089
S1b
S2b
VBAT
C1
220 nF
7xxxF3
TEST
EQUIP-
MENT
RING
GENERATOR
AI6XAJC
Figure 6. Typical Application Circuit
NOVEMBER 1995 - REVISED JANUARY 2007
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
